Comparison

iFactorAnalysis™ Lite vs Words Without Worries

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

iFactorAnalysis™ Lite

Features
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iFactorAnalysis is the first comprehensive advanced multivariate statistical package on iOS devices, for performing state-of-the-art exploratory factor analysis (EFA) and principal component analysis (PCA) on datasets of any practical size without a compromise. The app transforms iOS iPhone or iPad device into a valuable research and educational tool for educators, students, researchers and practitioners in almost any discipline from social & behavioural sciences such as sociology and psychology to medical & physical sciences. The app is packed with built-in advanced features, not available on main-stream commercial packages, such as SPSS and SAS. These include advanced factor retention techniques and unprecedented factor analysis interactivity. General Features: • Intuitive user-friendly interface design • Build projects from scratch in the app or import from externally created app project template • Fast, efficient and optimized algorithms for optimum performance • Fully interactive analysis of computed factors or components, thus allowing user to experiment with different options and settings • Extensive textual & graphical output of computations throughout the app Factor Analysis/Principal Component Analysis Features • Built-in advanced factor retention techniques such as Parallel Analysis & MAP • Horn’s parallel analysis (PA), configurable for up to 10,000 random-generated datasets, thus allowing accurate Gaussian Distribution graphs to be generated and studied. • Velicer’s Minimum Average Partials (MAP) • Cattell's Scree plots including PA base lines if PA is performed • Factor Rotation methods including orthogonal rotations such as Varimax, Orthomax, Quartimax and non-orthogonal (oblique) rotations such as direct oblimin • Factor scores methods from Thurstone’s regression method to the advanced Bartlett’s method and the sophisticated Anderson-Rubin method • Feasibility tests, including the Kaiser-Meyer-Olkin (KMO) Sampling Adequacy test and the Bartlett’s Sphericity test • Cronbach’s α (alpha) data consistency test The iFactorAnalysis app is offered in two editions, • The PRO edition, has all the features available with no restrictions. • The LITE edition (FREE), obviously has some restriction. In both editions, users may send feedback & questions, directly to iFactorAnalysis developement team. Website & links: iFactorAnalysis app website: https://www.acurasoft.com/ifactoranalysis/ End User Licence Agreement: https://www.acurasoft.com/ifactoranalysis_eula.html Privacy: https://www.acurasoft.com/ifactoranalysis_privacy.html Terms & Conditions: https://www.acurasoft.com/ifactoranalysis_terms.html

About

Words Without Worries

This app offers a fun and engaging way for children aged 6-12 to master spelling in French, English, and Spanish. It features five distinct spelling games designed by a speech therapist, utilizing proven learning methods to build lexical memory and prevent learning disabilities.

Highlights
  • 5 spelling games
  • French, English, Spanish support
  • 400 words, 40 spellings
  • Customizable word lists
  • Error-free learning method
  • Learning/testing intervals
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Master the difficulties of spelling in French, English and Spanish with Words Without Worries, an adventure in which 5 spelling games await you. Designed by world-renowned speech therapist Brigitte Stanké, Words Without Worries is an application designed to teach lexical spelling to children aged 6 to 12. Words Without Worries makes learning fun by offering a bank of 400 words covering 40 spellings on 2 levels of difficulty. Words Without Worries also offers the possibility of creating your own word lists or acquiring new lists to continue learning. The games are based on the following teaching methods: ERROR-FREE - Teach spelling by reducing exposure to error while learning. BY SPELLING REGULARITIES - Provide learners with lists of inconsistent words that share certain spelling regularities or rely on spelling rules. BY REPEATED EXPOSURE - Consolidate new learning to expose the learner to the same well-spelled words at least 6 times. BY LEARNING/TESTING - Teach and assess in a close interval by repeating the sequence several times. Want to reduce or even prevent learning disabilities in reading and writing? Download Words Without Worries! + promotes the development of the skills needed to learn reading and spelling, including lexical memory; + can also be a re-education tool for children with reading and spelling difficulties. Would you like to make learning to read and write fun and challenging? Download Words Without Worries! The free version allows you to try all the games offered in this application. A subscription is required to unlock all games. Terms of use: https://www.appligogiques.com/docs/msm-conditions-en Privacy policy: https://www.appligogiques.com/docs/privacy-policy

Screenshots

iFactorAnalysis™ Lite4 screens
Words Without Worries4 screens

Verdict

The call

The clearest difference is in-app purchases: iFactorAnalysis™ Lite at none against Words Without Worries's 4. Words Without Worries's advantage is update cadence (every 2 months vs every 8 months). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Words Without Worries sells 2 in-app purchases, starting at $3.49 per month. iFactorAnalysis™ Lite asks for nothing beyond the download.

UpkeepUpdate frequency

iFactorAnalysis™ Lite ships an update every 8 months, Words Without Worries every 2 months. The most recent releases landed on October 19, 2026 and October 6, 2026 respectively.

Scorecard2 real differences · 6 level
iFactorAnalysis™ Lite versus Words Without Worries: the parameters behind the verdict, then further details
ParameteriFactorAnalysis™ LiteWords Without Worries
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyEvery 8 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS13.012.0 — better
Further details — not scored
Size18 MB498 MB
Age rating4+4+
DeveloperAcurasoft Inc.Appligogique

In-app purchases

None

iFactorAnalysis™ Lite

No in-app purchases

2 purchases

Words Without Worries

Subscriptions2
  • Monthly Subscription2 variants$3.491 Month
  • Annual subscription2 variants$29.991 Year

Questions

Is iFactorAnalysis™ Lite free?
iFactorAnalysis™ Lite is free to download, with no in-app purchases.
Is Words Without Worries free?
Words Without Worries is free to download, with in-app purchases available.
Do iFactorAnalysis™ Lite or Words Without Worries have ads?
Neither iFactorAnalysis™ Lite nor Words Without Worries shows ads.
Which is updated more often, iFactorAnalysis™ Lite or Words Without Worries?
iFactorAnalysis™ Lite ships an update every 8 months, and Words Without Worries every 2 months. Most recently, iFactorAnalysis™ Lite was updated on October 19, 2026 and Words Without Worries on October 6, 2026.

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